The KJ25 antibody specifically reacts with the Vβ 3 T-cell Receptor (TCR) of strains having the a (e.g., C57BR, SJL), b (e.g., AKR, CBA/Ca, C57BL, DBA/1), and c (e.g., RIII) haplotypes of the Tcrb gene complex. Vβ 3 TCR-bearing T lymphocytes are clonally eliminated either completely or partially in mice expressing superantigens encoded by the Mtv-1 (Mls-4[a], Mls[c]), Mtv-3 (Mls[c]), Mtv-6 (Mls-3[a], Mls[c]), Mtv-13 (Mls-2[a], Mls[c]), Mtv-27, Mtv-44, and/or Mtv-MAI endogenous proviruses (e.g., A, BALB/c, CBA/J, C3H/He, DBA/2, NZB, NZW). Vβ 3 TCR-bearing T cells are activated by the superantigenic Staphylococcal Enterotoxins A and B. Activation or elimination of Vβ 3 TCR-expressing T cells by these determinants is partially dependent upon presentation by I-E. This hamster mAb to a mouse leukocyte antigen does not cross-react with rat leukocytes.
The antibody was conjugated to BD Horizon™ BUV496 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome of BD Horizon BUV395 with an Ex Max of 348-nm and an acceptor dye with an Em Max at 496-nm. BD Horizon BUV496 can be excited by the ultraviolet laser (355 nm) and detected with a 515/30 nm filter with a 450LP. Due to the excitation of the acceptor dye by other laser lines, there may be significant spillover into the channel detecting BD Horizon V500 or BV510 (eg, 525/40-nm filter). However, the spillover can be corrected through compensation as with any other dye combination.